[SRU][J/F][PATCH 0/1] CVE-2023-52927

[Tim Whisonant]

SRU Justification:

[Impact]

netfilter: allow exp not to be removed in nf_ct_find_expectation

Currently nf_conntrack_in() calling nf_ct_find_expectation() will
remove the exp from the hash table. However, in some scenario, we
expect the exp not to be removed when the created ct will not be
confirmed, like in OVS and TC conntrack in the following patches.

This patch allows exp not to be removed by setting IPS_CONFIRMED
in the status of the tmpl.

[Fix]

Oracular: not affected
Noble:    not affected
Jammy:    backported from upstream
Focal:    backported from upstream
Bionic:   patch sent to ESM ML
Xenial:   work needed - too many prerequisites
Trusty:   out of scope

[Test Plan]

Compile and boot tested.

[Where problems could occur]

The changes appear in the netfilter connection tracking code,
specifically in the expectation lookup and removal. Problems
might involve failure to release expectations at the appropriate
time.

Xin Long (1):
  netfilter: allow exp not to be removed in nf_ct_find_expectation

 include/net/netfilter/nf_conntrack_expect.h | 2 +-
 net/netfilter/nf_conntrack_core.c           | 2 +-
 net/netfilter/nf_conntrack_expect.c         | 4 ++--
 net/netfilter/nft_ct.c                      | 2 ++
 4 files changed, 6 insertions(+), 4 deletions(-)

-- 
2.43.0